[obionespeedonly]

Great post Alex!!

Alex has wrenched and knows what he was doing. If you're a newbie, seek help for the best way to do the set-up. Also, be sure that your limit screws are set for this, as you don't want the derailleur being allowed to move too far from either gear, and allowing the chain to fly loose. The spacers are readily available from old cassettes, the best being aluminum Shimano's (usually stamped in black reading "9S") Also, take an old 11 or 12 t cog, grind off the teeth and use this as your final spacer, so that your lockring function properly.

Honestly though, a Gusset 1-er kit is easier than scrounging the LBS's crap pile, and cogs are cheap enough.